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Author Question: What is the origin of the variety in the properties of polyurethanes? What will be an ideal ... (Read 53 times)

Wadzanai

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on: Aug 19, 2018
What is the origin of the variety in the properties of polyurethanes?
 
  What will be an ideal response?

Question 2

Discuss two methods that might be employed to make an epoxy resin tougher.
 
  What will be an ideal response?


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karlss

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Reply #1 on: Aug 19, 2018
Answer to Question 1

The urethane bond is easily formed with little consequence of the groups that are between the active groups on the polymers. Therefore, a wide variety of structural shapes are possible for these groups. These groups determine the basic properties of the polyurethane and, therefore, give rise to the variability.

Answer to Question 2

One method would be to add a rubber toughener to the epoxy resin. Another method would be to change the nature of the epoxy so that it is more aliphatic and less aromatic.


Wadzanai

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Reply 2 on: Aug 19, 2018
:D TYSM

bitingbit

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Reply 3 on: Yesterday
Wow, this really help

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